Java J2EE Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java (6529)
Advanced Java (552)
Swing (223)
EJB (402)

Servlets (804)
Struts (701)
JDBC (771)
JMS (324)

SunOne (10)
J2EE (485)
Weblogic (694)
Websphere (573)

Java J2EE Interview Questions

Questions Answers Views Company eMail

when i write string s1="java"; in one program(application) and string s2="java"; in another application on the same jvm will both objects s2,s2 will refer to same memory location where "java" is stored in string pool.

2 5665

Is Struts Action class Thread Safe?

Wipro,

14 53509

Why operator overloading is not in Java?

2077

What is the difference between throw and throws? What is the similarity between try and throw?

2 5747

Is it possible to create Userdefined Unchecked Exception also?If Yes, give an example?

HCL,

1 4706

What is the need of "creating and throwing an UserdefinedException" when the "Exception" class is already available?

4 6760

Is it possible to create Userdefined Unchecked Exception also?If Yes, give an example?

ADP,

2 8850

What is JIT ?

Satyam,

4 10032

How to implement or use the singleton class in java?

3 8087

can we add two numbers without using arthematic operators? if possible how?

CTS,

5 9710

why the equals method can be override?when we override the equals method?

5 11105

why the wait,notify,notifyall methods are placed in object class?these are the thread concepts why these methods are placed in Object class?

Global Logic, Satyam,

2 11544

using equals method overriding which objects are compared?i.e same class objects or other class objects?Explain me.

4 6398

If set accepts only one argument then how can it compare two objects to avoid duplicates

5 7143

can u override the start() method of Thread class

5 20160

Un-Answered Questions { Java J2EE }

What is a JAR file?

1044

Difference between association, composition and aggregation?

977

Difference between linkedlist and arraylist.

1070

What is java ceil?

1031

What is a databasemetadata?

948

Can a lock be acquired on a class in java programming?

991

Where and how can you use a private constructor?

989

What are loops in java?

1268

Why we use struts in java?

926

Why orm tool is being used?

343

What is a session? Can you share a session object between different theads?

979

What is the purpose of orm?

350

What is a variable and constant?

1001

What is difference between java and java ee?

1026

Can we pass null as argument in java?

944

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